Castor Seed
Sow in July, harvest around December
This season's sowing time (July–August) is over.
Grown on 1,041 acres here. Priced from mandis across your state.
Only with irrigation: rain gives too little of its water to count on
- Doesn't suit: Too dry without irrigation
- Suits: Ideal temperatures
- Needs care: Soil 6/10
Why, and how to make it work Hide details
Water
Too dry to grow on rain alone. It would need irrigation.
Needs about 590 mm of water here in its growing months. Rain gives about 230 mm it can use in a normal year, and 150 mm in a dry year.
Temperature
Grows best at 20–30 °C on average, and survives 15–39 °C.
Here, in its growing months (day / night):
- Jul 31 °C / 23 °C
- Aug 31 °C / 23 °C
- Sep 31 °C / 23 °C
- Oct 32 °C / 22 °C
- Nov 31 °C / 20 °C
- Dec 31 °C / 18 °C
Soil
Soil for Castor Seed: 6 out of 10 (okay).
Not in the score: phosphorus and salt.
- The pH here suits it.
- Many fields here are short of boron, which it needs a lot.
- Most fields here are short of nitrogen.
- Most fields here are short of organic carbon.
Likes pH 6.0–7.5.
How the soil score worksMoney
Yield: about 2.4 quintals an acre here in this season (district figures).
Rain gives it too little of the water it needs, so there's no income figure on rain alone: grow it only with irrigation.
Mandi price at last season's harvest (December 2025–January 2026): about ₹6,448 a quintal across mandis in your state.
This week: about ₹7,560 a quintal, the middle of 9 mandis across India (latest 13 Nov).
- ₹4,610 2021
- ₹6,480 2022
- ₹6,100 2023
- ₹5,600 2024
- ₹5,830 2025
Prices are usually best in January.
Typical costs are about ₹24,000 an acre: about half of what a usual harvest earns (2024–2026), as in farm cost surveys. They are spent whatever the harvest.
How to make it work
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Short of nitrogen Your soil is likely short of nitrogen.
Add about a quarter more urea than the usual dose, in two or three splits. A pulse crop in rotation also adds nitrogen.
About 100% of local fields of this crop get it.
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Short of organic carbon Your soil is likely short of organic carbon.
Add 4 tonnes of compost or farmyard manure per acre before sowing, and plough crop leftovers back in instead of burning them.
Few local farmers add it to this crop, so it's an easy place to get ahead.
-
Short of zinc Your soil is likely short of zinc.
Mix 10 kg of zinc sulphate per acre into the soil before sowing. One dose lasts two or three seasons.
Few local farmers add it to this crop, so it's an easy place to get ahead.
-
Short of iron Your soil is likely short of iron.
Spray ferrous sulphate, 5 g per litre of water, when young leaves turn yellow.
Few local farmers add it to this crop, so it's an easy place to get ahead.
-
Short of boron Your soil is likely short of boron.
Mix 4 kg of borax per acre into the soil before sowing.
Few local farmers add it to this crop, so it's an easy place to get ahead.
What local farmers put on it (share of fields):
- Di-Ammonium Phosphate (DAP) 100%
- Urea 100%